7920420 has 48 divisors (see below), whose sum is σ = 22413888. Its totient is φ = 2089600.

The previous prime is 7920401. The next prime is 7920431. The reversal of 7920420 is 240297.

7920420 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5407 + ... + 6713.

It is an arithmetic number, because the mean of its divisors is an integer number (466956).

Almost surely, 2^7920420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7920420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11206944).

7920420 is an abundant number, since it is smaller than the sum of its proper divisors (14493468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7920420 is a wasteful number, since it uses less digits than its factorization.

7920420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 7920420 is about 2814.3240751555. The cubic root of 7920420 is about 199.3346221498.

The spelling of 7920420 in words is "seven million, nine hundred twenty thousand, four hundred twenty".